Cab front protection device and mining excavator

Abstract

The utility model provides a cab front protection device and a mining excavator. The cab front protection device comprises a cab left guardrail installed on a cab left walking board, a cab right guardrail installed on a cab right walking board and a cab front guardrail located above a cab front walking board. The cab front guardrail is composed of at least one rigid component and at least one flexible component which are arranged at intervals up and down. The two ends of the rigid component are fixed to the cab left guardrail and the cab right guardrail through first connecting components respectively. The two ends of the flexible part are fixed to the cab left guardrail and the cab right guardrail through second connecting parts respectively. A conventional cab front guardrail structure is replaced by the connecting rod structure, the connecting rod serving as a rigid component is fixed to the left guardrail and the right guardrail of the cab through the bolts, and the chain serving as a flexible component is fixed to the left guardrail and the right guardrail of the cab through the climbing hooks, so that the protective effect is achieved, and the risk that the root of the cab front guardrail is broken is avoided.

Description

Technical Field

[0001] The utility model relates to a front cab protection device, belonging to the technical field of mining excavators. Background Art

[0002] The front cab protection device equipped on mining hydraulic excavators is used to ensure the safety of the passing personnel on the front side of the cab. It mainly consists of a left cab guardrail, a front cab guardrail, a right cab guardrail, and a chain. The front cab guardrail is mostly a base-fixed guardrail, and the guardrail base is directly fixed on the front walkway of the cab. The two ends of the guardrail are fixed to the left and right cab guardrails through connecting clips, and the chain is fixed to the front cab guardrail through a climbing buckle. Since the front cab guardrail extends horizontally for a long distance and the vibration amplitude at its position is large for a long time, its root is prone to cracking due to large stress. Content of the Utility Model

[0003] In view of the problems existing in the above-mentioned prior art, the utility model innovatively designs a front cab protection device. It abandons the conventional structure of the front cab guardrail and changes it into a connecting rod structure. The connecting rod is fixed to the left and right cab guardrails through bolts, and the chain is fixed to the left and right cab guardrails through a climbing buckle, which not only plays a protective role but also avoids the risk of the root fracture of the front cab guardrail. The process of the connecting rod is relatively simple, saving sheet materials. The types of connecting parts used in the assembly process of this front cab protection device are single, which is convenient for procurement and assembly.

[0004] The utility model is realized according to the following technical solutions:

[0005] In a first aspect, the utility model provides a front cab protection device, including a left cab guardrail installed on the left walkway of the cab, a right cab guardrail installed on the right walkway of the cab, and a front cab guardrail located above the front walkway of the cab; the front cab guardrail is composed of at least one rigid component and at least one flexible component arranged at intervals up and down; the two ends of the rigid component are respectively fixed to the left cab guardrail and the right cab guardrail through a first connecting component; the two ends of the flexible component are respectively fixed to the left cab guardrail and the right cab guardrail through a second connecting component.

[0006] In some embodiments, the front cab guardrail is composed of a rigid component at the top and a plurality of flexible components located below the rigid component; the installation position of the rigid component is approximately at the top of the left cab guardrail and the right cab guardrail.

[0007] In some embodiments, the rigid component is a connecting rod; a first connecting component at the same height is welded to the top of each of the two opposite vertical rods on the front sides of the left cab guardrail and the right cab guardrail.

[0008] In some embodiments, the connecting rod is composed of a straight circular tube and bent plates fixed to the end faces at both ends of the straight circular tube. Through holes are formed in the bent plates; the first connecting component includes an ear plate I, a threaded seat, and a bolt; the ear plate I is welded to the left guardrail and the right guardrail of the cab respectively, the threaded seat is welded to the ear plate I. After the through holes at both ends of the connecting rod are aligned with the threaded holes on the threaded seats on both sides, the connecting rod is fixed to the first connecting components on both sides by screwing the bolts.

[0009] In some embodiments, the through holes formed in the bent plates are oblong holes, which can adjust the axial position of the connecting rod during the assembly of the connecting rod.

[0010] In some embodiments, the flexible component is a chain; two second connecting components at the same height are welded to the middle and lower parts of the two opposite vertical rods on the front sides of the left guardrail and the right guardrail of the cab respectively.

[0011] In some embodiments, the second connecting component includes an ear plate II with a through hole and a carabiner; the ear plate II is welded to the left guardrail and the right guardrail of the cab respectively, and both ends of the chain are connected to the corresponding ear plate II through a carabiner respectively.

[0012] In some embodiments, mounting plates are welded to the bottoms of the vertical rods of the left guardrail and the right guardrail of the cab. A plurality of mounting holes are provided on the mounting plates. The left guardrail of the cab is assembled on the left walkway of the cab and the right guardrail of the cab is assembled on the right walkway of the cab through a plurality of bolts.

[0013] In a second aspect, the present utility model provides a mining excavator, including a cab, and the above-mentioned front protection device of the cab is installed around the cab.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. The connecting rod is fixed to the left and right guardrails of the cab by bolts, and the chain is fixed to the left and right guardrails of the cab by carabiners. This structural method not only plays a protective role but also avoids the risk of fracture at the root of the front guardrail of the cab.

[0016] 2. The connecting rod is a welded structure, which is welded by a straight circular tube and a bent plate; the bent plate is provided with an oblong hole, and a certain position adjustment can be performed when it is fixed to the left and right guardrails of the cab by bolts, and the assembly is convenient.

[0017] 3. The connecting rod is directly fixed to the left and right guardrails of the cab by bolts, eliminating the use of connecting parts such as connecting clips and sleeves, reducing the types of connecting parts, and making the assembly and procurement more convenient.

[0018] 4. When using this front cab protection device, the manufacturing process is simple, less sheet material is used, and the utilization rate of the sheet material is improved. Description of the Drawings

[0019] The drawings, as part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0020] In the drawings:

[0021] Figure 1 It is a schematic application diagram of a front cab protection device of the present utility model;

[0022] Figure 2 It is a schematic diagram of the left cab guardrail of the present utility model;

[0023] Figure 3 It is a schematic diagram of the right cab guardrail of the present utility model;

[0024] Figure 4 It is a schematic diagram of the connecting rod of the present utility model;

[0025] Figure 5 It is a schematic diagram of the chain and climbing buckle of the present utility model.

[0026] Label description: 1: Left cab walkway; 2: Left cab guardrail; 3: Washer; 4: Bolt; 5: Climbing buckle; 6: Chain; 7: Connecting rod; 8: Front cab walkway; 9: Right cab guardrail; 10: Right cab walkway; 11: Cab; 2-1: Ear plate Ⅰ; 2-2: Threaded seat; 2-3: Ear plate Ⅱ; 7-1: Bent plate; 7-2: Straight round tube.

[0027] It should be noted that these drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] As Figure 1 shown, a front protection device for a cab includes a left cab guardrail 2 installed on the left walkway 1 of the cab, a right cab guardrail 9 installed on the right walkway 10 of the cab, and a front cab guardrail located above the front walkway 8 of the cab; the front cab guardrail is composed of at least one rigid member and at least one flexible member arranged at intervals up and down; both ends of the rigid member are respectively fixed to the left cab guardrail 2 and the right cab guardrail 9 through a first connecting member; both ends of the flexible member are respectively fixed to the left cab guardrail 2 and the right cab guardrail 9 through a second connecting member.

[0032] The following further describes the above-mentioned front cab guardrail.

[0033] Continue to refer to Figure 1 shown, the front cab guardrail is composed of a rigid member at the top and a plurality of flexible members located below the rigid member; the installation position of the rigid member is approximately at the top of the left cab guardrail 2 and the right cab guardrail 9.

[0034] It should be noted that the reason why the top of the guardrail is a rigid member is that when a person walks through the front walkway of the cab, they can hold the rigid member to walk steadily; if the top of the guardrail is a flexible member, there will be a shaking phenomenon when a person holds the flexible member, which may cause unstable walking and thus there is a risk of falling from the front walkway 8 of the cab.

[0035] The following further describes the connection between the above-mentioned rigid member and the left and right cab guardrails.

[0036] As Figure 2 、 Figure 3 、 Figure 4As shown in the figure, the rigid component is the connecting rod 7. At the top of two vertical rods on the front sides of the left cab guardrail 2 and the right cab guardrail 9, there is a first connecting component welded at the same height. The connecting rod 7 consists of a straight round tube 7-2 and bent plates 7-1 fixed to the end faces at both ends of the straight round tube 7-2. Through holes are provided on the bent plates 7-1. The first connecting component includes an ear plate I 2-1, a threaded seat 2-2, and a bolt 4. The ear plate I 2-1 is welded to the left cab guardrail 2 and the right cab guardrail 9 respectively. The threaded seat 2-2 is welded to the ear plate I 2-1. After the through holes at both ends of the connecting rod 7 are aligned with the threaded holes on the threaded seats 2-2 on both sides, the connecting rod 7 is fixed to the first connecting components on both sides by screwing the bolt 4.

[0037] It should be noted that the first connecting component further includes a washer 3. The bolt 4 is inserted through the washer 3 and the through hole and then screwed into the threaded hole.

[0038] For a further solution, continue to refer to Figure 4 As shown in the figure, the through holes provided on the bent plates 7-1 are oblong holes, which can adjust the axial position of the connecting rod 7 during the assembly of the connecting rod 7.

[0039] The connection between the above-mentioned flexible component and the left and right cab guardrails will be further described below.

[0040] As Figure 2 、 Figure 3 、 Figure 5 As shown in the figure, the flexible component is a chain 6. At the middle and lower parts of two vertical rods on the front sides of the left cab guardrail 2 and the right cab guardrail 9, there is a second connecting component welded at the same height. The second connecting component includes an ear plate II 2-3 with a through hole and a carabiner 5. The ear plate II 2-3 is welded to the left cab guardrail 2 and the right cab guardrail 9 respectively. Both ends of the chain 6 are connected to the corresponding ear plate II 2-3 through a carabiner 5.

[0041] The connection method of the above-mentioned left and right cab guardrails will be further described below.

[0042] As Figure 1 、 Figure 2 、 Figure 3 As shown in the figure, mounting plates are welded to the bottom of the vertical rods of the left cab guardrail 2 and the right cab guardrail 9. A plurality of mounting holes are provided on the mounting plates. The left cab guardrail 2 is assembled on the left cab walkway 1 and the right cab guardrail 9 is assembled on the right cab walkway 10 through a plurality of bolts 4 and washers 3.

[0043] It should be noted that in this embodiment, one connecting rod 7 and two chains 6 are assembled between the left cab guardrail 2 and the right cab guardrail 9. Of course, in actual design, it is not limited to the above quantity, and it can also be designed as two connecting rods and three chains.

[0044] The assembly process of the above-mentioned front protective device for the cab is as follows:

[0045] As Figure 1 shown, first, the left guardrail 2 of the cab is assembled on the left walkway 1 of the cab through bolts 4 and washers 3, the right guardrail 9 of the cab is assembled on the right walkway 10 of the cab through bolts 4 and washers 3, the connecting rod 7 is assembled on the left guardrail 2 and the right guardrail 9 of the cab respectively through bolts 4 and washers 3, and then the chain 6 is assembled on the left guardrail 2 and the right guardrail 9 of the cab through climbing buckles 5. Finally, the front protective device for the cab is assembled on the walkway.

[0046] In summary, the present utility model discloses a front protective device for a cab, including a left guardrail of the cab, a connecting rod, a right guardrail of the cab, and a chain. The connecting rod is fixed to the left and right guardrails of the cab through bolts and washers, and the chain is fixed to the left and right guardrails of the cab through climbing buckles. This structural method not only plays a protective role but also avoids the risk of fracture at the root of the front guardrail of the cab. The connecting rod in the present utility model is a welded structure, which is formed by welding a straight round tube and a bent plate. The bent plate is provided with an oblong hole, and a certain position adjustment can be carried out when it is fixed to the left and right guardrails of the cab through bolts, which is convenient for assembly. The connecting rod in the present utility model is directly fixed to the left and right guardrails of the cab by bolts, eliminating the use of connecting parts such as connecting clips and sleeves, reducing the types of connecting parts, and making assembly and procurement more convenient. Using this front protective device for the cab, the manufacturing process is simple, less sheet material is used, and the utilization rate of the sheet material is improved.

[0047] The mining excavator provided by the present utility model will be described below. The mining excavator described below can be mutually corresponding and referred to the front protective device for the cab described above.

[0048] As Figure 1 shown, the present utility model provides a mining excavator, including a cab 11, and the above-mentioned front protective device for the cab is installed around the cab 11.

[0049] The beneficial effects achieved by the mining excavator provided by the present utility model are consistent with the beneficial effects achieved by the front protective device for the cab provided by the present utility model, so they will not be elaborated here.

[0050] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0051] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features contained in other embodiments rather than other features, the combination of the features of different embodiments also means that it is within the protection scope of the present utility model and forms different embodiments. For example, in the above embodiments, those skilled in the art can use them in a combined manner according to the known technical solutions and the technical problems to be solved by this application.

[0052] The above description is only a preferred embodiment of the present utility model and does not impose any formal restrictions on the present utility model. Although the present utility model has been disclosed above with a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present utility model, can make some changes or modifications using the technical content prompted above to form equivalent embodiments of equivalent changes. However, as long as the content does not depart from the technical solution of the present utility model, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A cab front protection device, comprising a cab left guardrail installed on the left walkway of the cab and a cab right guardrail installed on the right walkway of the cab; characterized in that: It further includes a cab front guardrail located above the front walkway of the cab, and the cab front guardrail is composed of at least one rigid component and at least one flexible component arranged at intervals up and down; Both ends of the rigid component are respectively fixed to the cab left guardrail and the cab right guardrail through a first connecting component; both ends of the flexible component are respectively fixed to the cab left guardrail and the cab right guardrail through a second connecting component.

2. The cab front protection device according to claim 1, characterized in that: The cab front guardrail is composed of a rigid component at the top and a plurality of flexible components located below the rigid component; The installation position of the rigid component is approximately at the top of the cab left guardrail and the cab right guardrail.

3. The cab front protection device according to claim 2, characterized in that: The rigid component is a connecting rod; a first connecting component at the same height is welded to the top of each of the two opposite vertical rods on the front sides of the cab left guardrail and the cab right guardrail.

4. The cab front protection device according to claim 3, characterized in that: The connecting rod is composed of a straight circular tube and bent plates fixed to the end faces of both ends of the straight circular tube, and through holes are provided on the bent plates; The first connecting component includes an ear plate I, a threaded seat and a bolt; the ear plate I is welded to the cab left guardrail and the cab right guardrail respectively, the threaded seat is welded to the ear plate I, and after the through holes at both ends of the connecting rod are aligned with the threaded holes on the threaded seats on both sides, the connecting rod is fixed to the first connecting components on both sides by screwing the bolt.

5. The cab front protection device according to claim 4, characterized in that: The through holes provided on the bent plates are oblong holes, and when assembling the connecting rod, the axial position of the connecting rod can be adjusted.

6. The cab front protection device according to claim 2, characterized in that: The flexible component is a chain; a second connecting component at the same height is welded to the middle and lower parts of each of the two opposite vertical rods on the front sides of the cab left guardrail and the cab right guardrail.

7. The cab front protection device according to claim 6, characterized in that: The second connecting component includes an ear plate II with a through hole and a carabiner; the ear plate II is welded to the cab left guardrail and the cab right guardrail respectively, and both ends of the chain are connected to the corresponding ear plate II through a carabiner.

8. The cab front protection device according to claim 1, characterized in that: Mounting plates are welded to the bottoms of the vertical rods of the cab left guardrail and the cab right guardrail, and a plurality of mounting holes are provided on the mounting plates. The cab left guardrail is assembled on the left walkway of the cab and the cab right guardrail is assembled on the right walkway of the cab through a plurality of bolts.

9. A mining excavator, comprising a cab, characterized in that: The cab front protection device according to any one of claims 1 to 8 is installed around the cab.

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